NO. 1205 SYNOPSIS OF THK NALADES SIMPSON. 659 



sudden ly behind, and back of these there are flue radiating ridges; 

 epidermis smooth, shining, often rayed; hinge line slightly incurved in 

 front of the beaks, edentulous or bearing the merest rudiments of 

 teeth; muscle scars shallow, irregular; nacre bluish white. 



Animal with marsupium occupying the outer and sometimes the four 

 leaves of the branchiae; ovules more numerous in the outer, the whole 

 pad like; gills large, inner semicircular, free from the abdominal sac, 

 or united to it; branchial opening large, with many small papillae; 

 anal opening with well-developed papillae. 



f ANODONTOIDES FERUSSACIANUS Lea. 



* Anodonta fentsxaciana LEA, Tr. Am. Phil. Soc.. V, 1834, p. 45, pi. vi, fig. 15; *Obs., 



1, 1834, p. 157, pi. vi, p. 15. *HANLEY, Test. Moll., 1842, p. 218. *CATLOW 

 and REEVE, Conch. Norn., 1845, p. 66. CONRAD, Pr. Ac. Nat. Sci. Phila., VI, 

 1853, p. 264. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 502. *Mus- 

 GROVE, Phot. Conch., 1863, pi. i, fig. 15. "CLESSIN, Conch. Cab. Ano., 1873, 

 p. 75, pi. xxui, tig. 4. *B. H. WRIGHT, Check List, 1888. *P.ETEL, Conch. 

 Sam., Ill, 1890, p. 179. 



* Anodon ferussaciana DE KAY, Zool. of N. Y., Pt. 5, 1843, p. 200, pi. xvi, fig. 230. 

 SOWERBY, Conch. Icon., XVII, 1867, pi. xiv, fig. 51. 



* Margarita (Anodonta) ferussaciano, LEA, Syu., 1836, p. 51 ; 1833, p. 30. 

 *Maryaron (Anodonta) ferussaciana LEA, Syn., 1852, p. 50; 1870, p. 79. 

 "Anodontoidesfermsacianus BAKER, Moll. Chicago, Pt. 1, 1898, p. 72, pi. in, fig. 6; v, 



fig. 2. 



* t Anodonta buchanenxis LEA, Tr. Am. Phil. Soc., VI, 1838, p. 47, pi. xiv, fig. 43; 



* Obs., II, 1838, p. 47. pi. xiv, fig. 43. *TROSCHEL, Arch, fur Nat., V, 1839, Pt. 



2, p. 238.* HANLEY, Test. Moll., 1842, p. 223; Biv. Shells, 1843, p. 223. * CAT- 

 LOW and REEVE, Conch. Nona., 1845, p. 66. * CONRAD, Pr. Ac. Nat. Sci. Phila., 

 VI, 1853, p. 263.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 503.* Sow- 

 ERBY, Couch. Icon., XVII, 1869, pi. xxiv, fig. 92. *B. H. WRIGHT, Check 

 List, 1888. * P.ETEL, Conch. Sam., Ill, 1890, p. 177. 



*Maryarita (Anodonta) buchancnsis LEA, Syn., 1836, p. 54; 1838, p. 32. 



*Maryaron (Anodonta) buchanensis LEA, Syn., 1852, p. 51; 1870, p. 82. 



*t Anodonta aryen tea LEA, Pr. Ac. Nat. Sci. Phila., I, 1840, p. 289; *Tr. Am. Phil. 



Soc., VIII, 1842, p. 223, pi. xix, fig. 41 ; * Obs., Ill, 1842, p. 61, pi. xix, fig. 41. 



*H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 502. * CLKSSIN, Conch. Cab. 



Ano., 1876, p. 218, pi. LXXII, figs. 3, 4. *B. H. WRIGHT, Check List, 1888. 



*P.ETEL, Conch. Sam., Ill, 1890, p. 176. 



*ATaryaron (Anodonta) aryentea LEA, Syn., 1852, p. 50; 1870, p,79. 

 *Stroplntii8 argenteus CONRAD, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 262. 

 *t Anodonta femtyinea LEA, Pr. Am. Phil. Soc., 1, 1840, p. 289 ; * Tr. Am. Phil. Soc., 



VIII, 1842, p. 225, pi. xix, fig. 43; *Obs., Ill, 1842, p. 63, pi. xix, fig. 43. 



* CONRAD, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 264.* H. and A. ADAMS, Gen. 

 Rec.Moll., II, 1857, p. 502. *MUSGKOVE, Phot. Couch., 1863, pi. i, fig. 2. 

 *CLESSIN, Conch. Cab. Ano., 1876, p. 219, pi. LXXII, figs. 5, 6. *B. H. 

 WRIGHT, Check List, 1888. * P^TEL, Conch. Sam., Ill, 1890, p. 179. 



*Maryaron (Anodonta) femtyinea LEA, Syn., 1852, p. 50; 1870, p. 79. 



*\Anodonta plicata HALDEMAN, Jl. Ac. Nat. Sci. Phila., VIII, 1842, p. 201." CON- 

 RAD, Pr.Ac.Nat.Sci. Phila., VI, 1853, p.264. * B. H. WRIGHT, Check List, 1888. 



*Maryaron (Anodonta) plicala LEA, Syn., 1870, p. 79. 



*t Anodonta deniyrata LEA, Tr. Am. Phil. Soc., X, 1852, p. 285, pi. xxv, fig. 45; 

 *Obs., V, 1852, p. 41, pi. xxv, fig. 45.* CONRAD, Pr. Ac. Nat. Sci. Phila,, VI, 

 1853, p. 264.* H. and A. ADAMS, Geu. Rec. Moll., II, 1857, p. 502.* CLESSIN, 



